s390/hibernate: add early resume function
Some functions that do arch specific resume actions are called
directly from swsusp_asm64.S . Before we add another function call
provide a generic s390_early_resume function which can be used
for this purpose.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
index ffb8989..d426250 100644
--- a/arch/s390/include/asm/cio.h
+++ b/arch/s390/include/asm/cio.h
@@ -296,6 +296,7 @@
return 0;
}
+void channel_subsystem_reinit(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index c479d2f..eebab9f 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -10,6 +10,8 @@
#include <linux/suspend.h>
#include <linux/mm.h>
#include <asm/ctl_reg.h>
+#include <asm/ipl.h>
+#include <asm/cio.h>
/*
* References to section boundaries
@@ -211,3 +213,10 @@
__ctl_set_bit(0,28);
local_mcck_enable();
}
+
+/* Called at the end of swsusp_arch_resume */
+void s390_early_resume(void)
+{
+ lgr_info_log();
+ channel_subsystem_reinit();
+}
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index c487be4..6b09fdf 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -281,11 +281,8 @@
lghi %r2,0
brasl %r14,arch_set_page_states
- /* Log potential guest relocation */
- brasl %r14,lgr_info_log
-
- /* Reinitialize the channel subsystem */
- brasl %r14,channel_subsystem_reinit
+ /* Call arch specific early resume code */
+ brasl %r14,s390_early_resume
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)